bluetooth: Refactor (Add|Remove)Observer impls into BluetoothAdapter.

device/bluetooth/bluetooth_adapter_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/bluetooth/bluetooth_adapter_win.h"
 
 #include <hash_set>
 #include <string>
 #include <utility>
 
@@ skipping 35 matching lines @@
       weak_ptr_factory_(this) {
 }
 
 BluetoothAdapterWin::~BluetoothAdapterWin() {
   if (task_manager_.get()) {
     task_manager_->RemoveObserver(this);
     task_manager_->Shutdown();
   }
 }
 
-void BluetoothAdapterWin::AddObserver(BluetoothAdapter::Observer* observer) {
-  DCHECK(observer);
-  observers_.AddObserver(observer);
-}
-
-void BluetoothAdapterWin::RemoveObserver(BluetoothAdapter::Observer* observer) {
-  DCHECK(observer);
-  observers_.RemoveObserver(observer);
-}
-
 std::string BluetoothAdapterWin::GetAddress() const {
   return address_;
 }
 
 std::string BluetoothAdapterWin::GetName() const {
   return name_;
 }
 
 void BluetoothAdapterWin::SetName(const std::string& name,
                                   const base::Closure& callback,
@@ skipping 298 matching lines @@
     num_discovery_listeners_ -= on_stop_discovery_callbacks_.size();
     on_stop_discovery_callbacks_.clear();
     return;
   }
 
   discovery_status_ = DISCOVERY_STOPPING;
   task_manager_->PostStopDiscoveryTask();
 }
 
 }  // namespace device